Question

(01.01 MC)

Answer 1

D. is the missing element.

Carlos hasn’t done research on what other scientists have observed and investigated on this topic. If he hasn’t done his literature research, he may just be repeating the experiments of other scientists working in the same area.

Options “A.”, “B.”, and “C.” are all part of the scientific method.

Answer 2

Your answer would be D.

Research on what other scientists have observed and investigated on this topic.